diff --git a/hspec-api.cabal b/hspec-api.cabal
--- a/hspec-api.cabal
+++ b/hspec-api.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           hspec-api
-version:        2.8.0
+version:        2.9.0
 synopsis:       A Testing Framework for Haskell
 description:    This package provides a stable API that can be used to extend Hspec's functionality.
 category:       Testing
@@ -35,7 +35,7 @@
   ghc-options: -Wall
   build-depends:
       base ==4.*
-    , hspec-core >=2.8.0 && <2.11
+    , hspec-core >=2.9.0 && <2.11
   default-language: Haskell2010
 
 test-suite spec
@@ -55,5 +55,5 @@
       base ==4.*
     , hspec ==2.*
     , hspec-api
-    , hspec-core >=2.8.0 && <2.11
+    , hspec-core >=2.9.0 && <2.11
   default-language: Haskell2010
diff --git a/src/Test/Hspec/Api/Format/V1.hs b/src/Test/Hspec/Api/Format/V1.hs
--- a/src/Test/Hspec/Api/Format/V1.hs
+++ b/src/Test/Hspec/Api/Format/V1.hs
@@ -16,6 +16,7 @@
 , monadic
 
 -- * Register a formatter
+, registerFormatter
 , useFormatter
 , liftFormatter
 
@@ -23,22 +24,23 @@
 , Config
 ) where
 
-import           Test.Hspec.Core.Runner
+import           Test.Hspec.Core.Runner (Config(..))
 import           Test.Hspec.Core.Format hiding (FormatConfig(..))
 import qualified Test.Hspec.Core.Format as Latest
 
 -- |
+-- Make a formatter available for use with @--format@.
+registerFormatter :: (String, FormatConfig -> IO Format) -> Config -> Config
+registerFormatter = registerFormatter_ . liftFormatter
+
+-- |
 -- Make a formatter available for use with @--format@ and use it by default.
 useFormatter :: (String, FormatConfig -> IO Format) -> Config -> Config
 useFormatter (liftFormatter -> formatter@(_, format)) config = (registerFormatter_ formatter config) { configFormat = Just format }
 
 -- copy of Test.Hspec.Core.Runner.registerFormatter
 registerFormatter_ :: (String, Latest.FormatConfig -> IO Latest.Format) -> Config -> Config
-#if MIN_VERSION_hspec_core(2,9,0)
 registerFormatter_ formatter config = config { configAvailableFormatters = formatter : configAvailableFormatters config }
-#else
-registerFormatter_ _ config = config
-#endif
 
 -- | Make a formatter compatible with types from "Test.Hspec.Core.Format".
 liftFormatter :: (String, FormatConfig -> IO Format) -> (String, Latest.FormatConfig -> IO Format)
@@ -49,7 +51,13 @@
 
 data FormatConfig = FormatConfig {
   formatConfigUseColor :: Bool
+, formatConfigReportProgress :: Bool
+, formatConfigOutputUnicode :: Bool
 , formatConfigUseDiff :: Bool
+, formatConfigDiffContext :: Maybe Int
+, formatConfigExternalDiff :: Maybe (String -> String -> IO ())
+, formatConfigPrettyPrint :: Bool -- ^ Deprecated: use `formatConfigPrettyPrintFunction` instead
+, formatConfigPrettyPrintFunction :: Maybe (String -> String -> (String, String))
 , formatConfigPrintTimes :: Bool
 , formatConfigHtmlOutput :: Bool
 , formatConfigPrintCpuTime :: Bool
@@ -60,14 +68,41 @@
 liftFormatConfig :: Latest.FormatConfig -> FormatConfig
 liftFormatConfig config = FormatConfig {
   formatConfigUseColor = Latest.formatConfigUseColor config
+
+#if MIN_VERSION_hspec_core(2,9,5)
+, formatConfigReportProgress = Latest.formatConfigReportProgress config
+#else
+, formatConfigReportProgress = Latest.formatConfigUseColor config
+#endif
+
+
+, formatConfigOutputUnicode = Latest.formatConfigOutputUnicode config
 , formatConfigUseDiff = Latest.formatConfigUseDiff config
+
+#if MIN_VERSION_hspec_core(2,10,6)
+, formatConfigDiffContext = Latest.formatConfigDiffContext config
+, formatConfigExternalDiff = Latest.formatConfigExternalDiff config
+#else
+, formatConfigDiffContext = Nothing
+, formatConfigExternalDiff = Nothing
+#endif
+
+
+#if MIN_VERSION_hspec_core(2,9,5)
+, formatConfigPrettyPrint = Latest.formatConfigPrettyPrint config
+#else
+, formatConfigPrettyPrint = True
+#endif
+
+#if MIN_VERSION_hspec_core(2,10,0)
+, formatConfigPrettyPrintFunction = Latest.formatConfigPrettyPrintFunction config
+#else
+, formatConfigPrettyPrintFunction = Nothing
+#endif
+
 , formatConfigPrintTimes = Latest.formatConfigPrintTimes config
 , formatConfigHtmlOutput = Latest.formatConfigHtmlOutput config
 , formatConfigPrintCpuTime = Latest.formatConfigPrintCpuTime config
 , formatConfigUsedSeed = Latest.formatConfigUsedSeed config
-#if MIN_VERSION_hspec_core(2,9,0)
 , formatConfigExpectedTotalCount = Latest.formatConfigExpectedTotalCount config
-#else
-, formatConfigExpectedTotalCount = Latest.formatConfigItemCount config
-#endif
 }
diff --git a/src/Test/Hspec/Api/Formatters/V1.hs b/src/Test/Hspec/Api/Formatters/V1.hs
--- a/src/Test/Hspec/Api/Formatters/V1.hs
+++ b/src/Test/Hspec/Api/Formatters/V1.hs
@@ -92,8 +92,4 @@
 
 -- copy of Test.Hspec.Core.Runner.registerFormatter
 registerFormatter_ :: (String, FormatConfig -> IO Format) -> Config -> Config
-#if MIN_VERSION_hspec_core(2,9,0)
 registerFormatter_ formatter config = config { configAvailableFormatters = formatter : configAvailableFormatters config }
-#else
-registerFormatter_ _ config = config
-#endif
diff --git a/src/Test/Hspec/Api/Formatters/V2.hs b/src/Test/Hspec/Api/Formatters/V2.hs
--- a/src/Test/Hspec/Api/Formatters/V2.hs
+++ b/src/Test/Hspec/Api/Formatters/V2.hs
@@ -21,7 +21,8 @@
 module Test.Hspec.Api.Formatters.V2 (
 
 -- * Register a formatter
-  useFormatter
+  registerFormatter
+, useFormatter
 , formatterToFormat
 
 -- * Formatters
@@ -52,6 +53,7 @@
 , getPendingCount
 , getFailCount
 , getTotalCount
+, getExpectedTotalCount
 
 , FailureRecord (..)
 , getFailMessages
@@ -74,6 +76,8 @@
 , withPendingColor
 , withFailColor
 
+, outputUnicode
+
 , useDiff
 , diffContext
 , externalDiffAction
@@ -102,17 +106,18 @@
 #endif
 
 -- |
+-- Make a formatter available for use with @--format@.
+registerFormatter :: (String, Formatter) -> Config -> Config
+registerFormatter formatter = registerFormatter_ (fmap formatterToFormat formatter)
+
+-- |
 -- Make a formatter available for use with @--format@ and use it by default.
 useFormatter :: (String, Formatter) -> Config -> Config
 useFormatter (fmap formatterToFormat -> formatter@(_, format)) config = (registerFormatter_ formatter config) { configFormat = Just format }
 
 -- copy of Test.Hspec.Core.Runner.registerFormatter
 registerFormatter_ :: (String, FormatConfig -> IO Format) -> Config -> Config
-#if MIN_VERSION_hspec_core(2,9,0)
 registerFormatter_ formatter config = config { configAvailableFormatters = formatter : configAvailableFormatters config }
-#else
-registerFormatter_ _ config = config
-#endif
 
 #if !MIN_VERSION_hspec_core(2,9,2)
 prettyPrint :: FormatM Bool